(1. 北京科技大學(xué) 冶金與生態(tài)工程學(xué)院，北京 100083；
2. 河北省萬全縣豐華有色金屬加工廠，張家口076250)
摘 要: 通過建立銅鋼復(fù)合冷卻壁傳熱及熱應(yīng)力分布數(shù)學(xué)模型，研究了銅鋼復(fù)合冷卻壁與銅冷卻壁、鑄鋼冷卻壁的傳熱性能差異及其銅鋼界面熱應(yīng)力分布。結(jié)果表明：煤氣溫度為1200 ℃時，高爐內(nèi)無渣皮覆蓋銅鋼復(fù)合冷卻壁肋熱面最高溫度為180 ℃，較相同煤氣溫度下銅冷卻壁的最高溫度高約30 ℃，較鑄鋼冷卻壁的最高溫度低約520 ℃。銅鋼復(fù)合冷卻壁具備銅冷卻壁的傳熱性能。銅鋼界面邊緣正應(yīng)力σz大于0，表現(xiàn)為受拉狀態(tài)；冷面增加加強筋后，銅鋼界面邊緣正應(yīng)力σz小于0，表現(xiàn)為受壓狀態(tài)，且最大等效應(yīng)力降低至114.45 MPa，低于銅鋼復(fù)合板的高溫強度。高爐內(nèi)銅鋼復(fù)合冷卻壁不會發(fā)生銅鋼界面分離破損。熱態(tài)試驗中銅鋼復(fù)合冷卻壁溫度計算值與測量值吻合較好，驗證了數(shù)學(xué)模型的準(zhǔn)確性。
關(guān)鍵字: 高爐；銅鋼復(fù)合冷卻壁；傳熱；熱態(tài)試驗；熱應(yīng)力
（1. School of Metallurgy and Ecology Engineering, University of Science and Technology Beijing,
Beijing 100083, China;
2. Hebei Wanquan Fenghua Nonferrous Manufactory, Zhangjiakou 076250, China）
Abstract:The heat transfer difference of copper steel composite stave with copper stave and cast steel stave and thermal stress distribution of copper steel interface were investigated through establishing a mathematical model of heat transfer and thermal stress distribution of copper steel composite stave. The results show that the maximum temperature at the rib of copper steel composite stave without the accretion is 180 ℃ when the furnace temperature is 1200 ℃, which is about 30 ℃ higher than that of copper stave and 520 ℃ lower than that of cast steel stave. Copper steel composite stave has the same heat transfer performance as copper stave. The normal stress σz at the free edge of copper steel interface is larger than 0 and it is submitted to tension. When welding the copper steel composite stave onto the reinforced rib, the normal stress σz at the free edge of copper steel interface is lower than 0 and it is submitted to compression, and the maximum equivalent stress of copper steel interface decreases to 114.45 MPa and it is less than the elevated temperature strength of copper steel composite plate. Copper steel composite stave will not be damaged by separation of copper and steel layer in blast furnace. The calculated and measured temperature of copper steel composite stave in the thermal test agree well, which verifies the validity of the mathematical model.
Key words: blast furnace; copper steel composite stave; heat transfer; thermal test; thermal stress
